Methane Emission, Nutrient Digestibility, Energy Metabolism and

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Furthermore, CH4 on combustion yield 892.6 kJ (25°C,. 1,013 hPa) per mole, .... dioxide (CO2) production were measured by using an open circuit respiration ...
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Methane Emission, Nutrient Digestibility, Energy Metabolism and Blood Metabolites in Dairy Cows Fed Silages with and without Galacto-oligosaccharides Supplementation B. Santoso, S. Kume1, K. Nonaka1, K. Kimura2, H. Mizukoshi2, Y. Gamo and J. Takahashi* Department of Animal Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan ABSTRACT : This study was conducted to investigate the effect of supplementation of galacto-oligosaccharides (GOS) on methane emission, nutrient digestibility, energy utilization and blood metabolites by Holstein cows fed silages. In two sequential digestion and respiratory trials, two non-lactating Holstein cows were arranged to a balanced incomplete block design. Experimental diets consisted of two silage types; orchardgrass (Dactylis glomerata L.) based silage (OS), mixed silage (orchardgrass based silage and alfalfa (Medicago sativa L.) silage) (MS), while two GOS levels were without supplementation (0) and 2% of dry matter intake supplementation (2). Four combination diets were OS-0, OS-2, MS-0 and MS-2. Significant effects of silage types and GOS supplementation levels were not observed for DM and OM intake. Whereas the digestibility of OM, NDF and ADF was significantly (p